Tracker Software Review: Meeting 8

November 1, 2017: 1400 GMT


1. Actions from previous meetings
  • PR:
    1. AD: Optimize Chi2 cut for “MINUIT” variant
    2. AD, CH: Check and implement MCS errors
    3. AD, KL: Define multi-track requirements
  • Track fit:
    1. Investigate whether field integration (e.g. using Runge Kutta) is required to compensate for magnetic field non-uniformity
    2. Make study of magnetic-field alignment with a view to establishing whether the present algorithm is sufficiently insensitive to reasonable assumptions of maximum field-misalignment
    3. Study p-value: split up contributions to p-value shape using MC and study shape in data, e.g. is there an error in the resolution per plane, handling of MCS, handing of energy loss, b field..
2. Recent issues:
  1. 50 MeV bump -- more pronounced with MINUIT?
  2. CR reports lower downstream efficiency, and fewer events in analysis when using MINUIT -- should MINUIT continue to be the default fitter in MAUS?
    1. 2017-10-21_lsq

3. PR Report: A. Dobbs
4. Track fit Report: C. Hunt

5. Next Steps for review
6. AoB

Dial-in information

analysis_real_3-0-1_official_09971_minuit-circlecut-10-0_minuit-longitcut-65-0_2017-10-23.pdf (1.8 MB) Dobbs, Adam, 01 November 2017 14:18

analysis_real_3-0-1_official_09971_lsq-circlecut-5-0_lsq-nturnscut-1-0_lsq-szcut-150-0_2017-10-23.pdf (1.81 MB) Dobbs, Adam, 01 November 2017 14:18

Screenshot_20171101_142437.png (178 KB) Dobbs, Adam, 01 November 2017 14:25

Screenshot_20171101_142619.png (210 KB) Dobbs, Adam, 01 November 2017 14:26